In the puna women carry children and belongings: they are a lot more fitted than men. They even walk behind their husband or any grown male in the family, and have no knives.
The no knives having explains why social organization haven't change that much, otherwise there would be a lot less males and many widowed women around Abuse is widespread, but I guess that's a modern consequence of western interference as long as a male wouldn't go long ways without a solid family (women) providing food and shelter for him.
Women put up with a huge deal of hard labour while men should be ready to defend the "house" "family/clan", I've seen "fat" men but no "fat" women over there.
PS while carrying my backpack I had to bent over and exhaustion was overwelming, my heart was loosing it and m,y lungs, well, there are asmathic rats who have more oxigen delivered to their cells but hey, a nice seventy years old lady passed by me trotting and carrying a sac of bitter potatoes three times the size of my backpack. She was half my weight. I felt like shit
No limits, only my will and the worlds I build.